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(No Model.) s Sheets-Sheet 1. D. EVANS. MACHINE FDR TINNING COPPERSHEETS.

No. 408,832. Patented Aug. 13, 1889.

3 Sheets-Sheet 2.

(No Model.) D. EVANS. MACHINE FOR TINNING COPPER SHEETS. No. 408,832.Patented Aug. 13, 1889.

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(No Model.) 3 Sheets-Sheet 3. D. EVANS.

MACHINE FOR TINNINGv COPPER SHEETS.

No. 408,832; Patented Aug. 13, 1889.

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UNITED STATES PATENT OFFICE.

DAVID EVANS, OF ANSONIA, CONNECTICUT, ASSIGNOR OF ONE-HALF TO RUFUS C.ALCOTT, OF SAME PLACE.

MACHINE FOR TlNNlNG COPPER SHEETS.

SPECIFICATION forming part of Letters Patent No. 408,832, dated August13, 1889.

Application filed January 14, 1889. Serial No. 296,221. (No model.)

To all whom it may concern.-

Be it known that 1, DAVID EVANS, a'eitizen of the United States,residing at Ansonia, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inMachines for Tinning Copper Sheets; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable oth ers skilled in the art to which it appertains tomake and use the same.

My invention relates to certain new and useful improvements in machinesfor tinning copper and other metal sheetssuch, for instance, as are usedin bath-tubs and the like and has for its object to-produce a machinewhereby a coating of the tin may be evenly and rapidly applied to onesurface of the sheet to be treated, or, by repetition, to both surfaces.

Heretofore in the tinning of sheet metal it has been usual when the tinwas to be applied to both sides of the sheet to dip the latter in meltedtin. In applying to one side only, either the molten metal has beenbrushed on by hand or it has been applied by means of rollers, as setforth in Letters Patent No. 383,116, granted to me the 22d of May, 1888.In the operation of the machine herein described the application of thetin is effected with much greater rapidity than by either of the methodsabove referred to, and the difficulty heretofore experienced by anychilling or difference of temperature of the rollers is done away with.

In order that those skilled in the art to which my invention appertainsmay more fully understand its construction and operation, I willdescribe the same in detail, reference being had to the accompanyingdrawings, which form a part of this speci tication, and in which Figure1 is a plan view of a machine constructed in accordance with myinvention; Fig. 2, a vertical longitudinal section on the line mmof Fig.1, and Fig. 3 a transverse vertical section on the line y y of Fig. 1.

Like numerals denote the same parts in all the figures.

1 is the frame or bed of the machine, and 2 sheet and also to straightenthe same, and 4 is a swab roll or brush whereby an acid or other flux isapplied to the under surface of the sheet from a tank or vessel5.

6 is a furnace placed beneath and adapted to apply heat to a pot orcrucible '7, which contains the coating metal.

8 is a pump connected with and adapted to raise the molten metal intothe pump-cylinder 9 and thence to force it into a pipe 10, which leadsout of said cylinder and across the machine just beneath the feed-lineof the sheet. Said pipe is slotted or perforated at its top surface forthe ejection of the metal. The pump may be operated independently; but Iprefer to impart properly-timed action thereto by connecting it with oneof the rolls at the after part of the machine, which, as shown at Fig.1, are operated by intermeshing gears.

I have shown a single pump only; but it is my preferred construction touse a duplex or a continuously-acting pump, so that the flow of themetal into the perforated pipe may be substantially constant.

11 are pressure-feet arranged on a bar 12 to keep the metal sheet, whichis lettered A, in close contact with the pipe.

13 is a hinged and swinging plate, whose edge engages the top surface ofthe metal sheet immediately above the perforated pipe when the sheet isfullyover the jet, but which hangs downward when no sheet is beneath itand acts as a shield to prevent any of the liquid metal from fallingupon the upper surface of the incoming sheet before said sheet passesinto the field of the jet.

11 is a swab-brush or felt-covered roll, which serves to evenlydistribute the metal which has been thrown upon the sheet, and whichalso serves to wipe off any surplus. This roll runs in a jacket-edvessel 15, cooled by a stream of water flowing constantly through thejacket, as from pipes 16.

17 is another furnace arranged beneath a crucible or pot 18, adapted tocontain the metal to be applied.

- A pair of rolls 19 20, the upper of cast-iron and the lower of steel,are arranged to act as calenders, and the lower roll runs in the pot andapplies a supplemental coating of metal to the sheet simultaneously withthe calelr dering operation. The dillerence of material in these rollsis occasioned by the fact set forth in my previous patent, that moltentin adheres to and will be taken up by the steel roller, but has not thesame at'tinity for castiron.

In the operation of my machine the feeding and flattening rollers drawin the sheet and the swab-roll applies a coating of the liquid flux tothe under surface thereof. Then the sheet, held down by thepressure-feet and the swinging plate, is exposed to the jets of meltedmetal thrown upon it by the pump from the pipe, and immediatelythereafter the second swab evens off the metal and removes any surplus,if need be. The last pair of rolls then apply the supplemental coatingfrom the second pot and simultaneously calender the sheetto a smooth andeven surface. In tinning sheets where only a single coating is to beapplied the pot of metal under the lower calender-roll may be dispensedwith.

I have not thought it necessary to explain in detail how the severalrolls and the pump are operated, since this is innnaterial. How ever, asshown at Fig. l, I have in this machine obtained the power for thefeeding and flux roll from a pulley I) and the power for the remainingrolls and the pump from pulley C.

I have shown the two pots and the two furnaces, one for the metal usedin the jets and the other for that applied by the calendcrs, and whileboth pots might be heated from the same furnace I prefer them to be independently heated, because the metal to be applied by jet; should beheated to a higher temperature than that which is applied by the rolls.

\Vhile the machine herein described particularly adapted for applyingtin to copper sheets, it may be advantageously employed wherever it issought to coat a base sheet of one metal with a coating or surface of adifferent metal.

Having thus described the machine, I claim as my invention relativethereto- 1. In a machine of the character described, the combination,with mechanism for feeding the sheet, devices for applying the flux, andthe calender-rolls, of the pot, means for heating the same, a, pumpconnected with said pot, and a perforated conduit connected with the potand extended contiguous to the face of the sheet, substantially as setforth.

2. The combination, with the pot, the pump arranged therein, and adistributing perforated conduit connectcd with the pump and extendedadjacent to the line of feed of the sheet, of the swab-roll engaging thesheet; after the operation of the pump, and a pair of calcnders locatedbehind the said swab and adapted to finish the sheet, substantially asdescribed.

13. The combination, with the pot, the pump arranged therein, and theperforated conduit leading from the pump, of the swab-roll locatedbehind the pump and its pot, and the ealemlcrs, the lower whereof runsin a pot of metal and is adapted in addition to its prcssing function toapply to the sheet a supplemental coating of metal, substantially as setforth.

4E. The combination, with the pot, the pump arranged in said pot, andthe perforated pipe, of the swinging shield hung above the said pipe,and whereby the top of the sheet is protected as against the metal ofthe jet, substantially as set forth.

5. The combination, with the pot and the pump arranged therein and aperforated conduit connected to said pump, of the feedingrolls and theflux-aprdying swab, the swab roll located behind the pump, and thecalender-rolls and the second metal pot, whereby the supplementalcoating of metal is imparted to the sheet, substantiallyas set forth.

1;. In a machine of the character described, the combination, with thedevices for the feeding of the sheet, of the pot and means for meltingits contents, a pump arranged in said pot at one end thereof, and aconduitpipe having one extremity connected to said pump and extendedacross the machine parallel and contiguous to the face of the sheet,said pipe having at its nearest point to the sheet a series ofperforations, whereby jets of molten metal may be projectml against thesheet, substantially as specified.

In testimony. whereof I atlix my signature in presence of two witnesses.

DAVI I) EVANS.

Witn esscs:

CHARLES II'. Pncn, CnAs. E. Emma.

IOO

